•Sibley, David Allen, The
Sibley Guide to Birds, Alfred A. Knopf, Inc.,( 2000)
•Evans, William R. and O’Brien, Michael, Flight Calls
of Migratory Birds, Old Bird, Inc.,
(2002)
•Getty, Stephen R., Call
Notes of North American Wood
Warblers in Birding Vol. XXV No. 3
(June 1993)
•Elliott, Lang, Stokes
Field Guide to Bird Songs, Time Warner (1997) for NOCA and PISI cuts